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How to add an empty column to a dataframe?

What's the easiest way to add an empty column to a pandas DataFrame object? The best I've stumbled upon is something like ...
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Difference between knockout View Models declared as object literals vs functions

...s to set a variable in the function equal to the appropriate value of this and use it instead. This would be like: var ViewModel = function() { var self = this; this.items = ko.observableArray(); this.removeItem = function(item) { self.items.remove(item); } }; Now, if yo...
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How to get first element in a list of tuples?

I have a list like below where the first element is the id and the other is a string: 12 Answers ...
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How to detect IE11?

...rnetExplorerVersion()); Note that IE11 (afaik) still is in preview, and the user agent may change before release. share | improve this answer | follow |...
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vim line numbers - how to have them on by default?

...f the .vimrc file is not in your home directory create one with vim .vimrc and add the commands you want at open. Here's a site that explains the vimrc and how to use it. share | improve this answe...
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Case in Select Statement

I have an SQL statement that has a CASE from SELECT and I just can't get it right. Can you guys show me an example of CASE where the cases are the conditions and the results are from the cases. For example: ...
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Unable to make the session state request to the session state server

...nistrative Tools –> Services Right-click on the ASP.NET State Service and click “start” Additionally you could set the service to automatic so that it will work after a reboot share | imp...
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appending array to FormData and send via AJAX

I'm using ajax to submit a multipart form with array, text fields and files. 9 Answers ...
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Can I find out the return value before returning while debugging in Eclipse?

...t possible to see the return value of a method after the line has been run and before the instruction pointer returns to the calling function? ...
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How do you overcome the svn 'out of date' error?

... I changed the svn:ignore property of a folder, and started getting the out of date error. But as you said, just updating it worked. – Sushant Oct 21 '09 at 6:49 ...